1329217 has 2 divisors, whose sum is σ = 1329218. Its totient is φ = 1329216.

The previous prime is 1329197. The next prime is 1329233. The reversal of 1329217 is 7129231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 266256 = 1031^2 + 516^2 .

It is an emirp because it is prime and its reverse (7129231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1329217 - 2¹⁹ = 804929 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1329191 and 1329200.

It is not a weakly prime, because it can be changed into another prime (1329277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664608 + 664609.

It is an arithmetic number, because the mean of its divisors is an integer number (664609).

2^1329217 is an apocalyptic number.

It is an amenable number.

1329217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329217 is an equidigital number, since it uses as much as digits as its factorization.

1329217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 1329217 is about 1152.9167359354. The cubic root of 1329217 is about 109.9508595934.

The spelling of 1329217 in words is "one million, three hundred twenty-nine thousand, two hundred seventeen".